The Air Con on my 1999 Xsara 2.0 HDi (90) LX doesn't appear to be working. When I press the Air Con Button the light comes on, but the air is not cooled. On previous cars that I have had, when the AirCon is activated you can here the engine tone change as it kicks in, but this isn't happening in the Xsara. Does anyone know what could be the cause of the problem ? I had it regassed just before the winter, because I didn't think it was working when I bought the car then, but I didn't have a good chance to test it until now. Hope someone can help. Cheers.